This section is from the "Elixirs And Flavoring Extracts. Their History, Formulae, & Methods of Preparation" book, by John Uri Lloyd. Also available from Amazon: Elixirs and flavoring extracts,: Their history, formulae, and methods of preparation;
Elixir of wild cherry, 16 fluidounces.
Tincture of chloride of iron, 1/2 fluidounces.
Solution of citrate of ammonium, 1/2 fluidounces.
Mix the tincture of chloride of iron with the solution of citrate of ammonium, and add this to the elixir of wild cherry.
Each fluidrachm (teaspoonful) of the finished elixir contains seven and one-half minims of fluid extract of wild cherry, and about two minims of tincture of chloride of iron.
This formula is based upon Mr. J. Creuse's experiments with "tasteless chloride of iron," and to him we are indebted for the improved process (citrate of ammonium mixed with chloride of iron) for associating iron with vegetable astringents. Should the foregoing produce an inky liquid, increase the amount of solution of citrate of ammonium. Since fluid extracts vary, the proportion of our formula is sometimes incorrect.